Abbreviations: BF: breastfeeding.
aFinancial stress defined as answering yes to one of the following occurring during or in the month after pregnancy: big problems with money, moved to a new address. (missing data from 2 mothers).
bEmotional stress defined as answering yes to one of the following occurring during or in the month after pregnancy: family member had serious accident/illness, husband/partner had serious accident/illness, husband/partner died, friend/relative died (missing data from 10 mothers).
cTraumatic stress defined as answering yes to one of the following occurring during or in the month after pregnancy: stayed in a shelter or needed emergency shelter, physical fights with partner/husband or someone else, husband/partner had legal trouble and/or went to jail, mother had legal trouble and/or went to jail, someone very close had a problem with drinking or drugs (missing data from 6 mothers).
dPartner-Associated stress defined as answering yes to one of the following occurring during or in the month after pregnancy: separated from husband/partner, argued with husband/partner more often, husband/partner said he did not want pregnancy (missing data from 0 mothers).
eBreastfeeding exclusivity was defined as the infant receiving only breast milk and no other liquid or solid food. This calculated outcome was based on mothers self-report of length of breastfeeding (infant age when last received breastmilk) and age when the infant first received formula, other liquids cereal, or solid foods.